Although stall will have more options, keep in mind that every pokemon ever will be able to run tons of coverage moves, as well as moves that help disrupt stall like trick, taunt, etc. I don't think stall will get out of hand.

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Basically, Trick your scarf onto an opponent setting up, should you come across one. Then proceed to invincibility, get a Sub up and sweep (or trick the scarf back first, if you like). At +6/+6/+6, very few things will hit your hard enough to break the Subs, and hopefully not hard enough to threaten you afterwards.

Why would you even use Acid Armor anyway? It's a terrible move in my opinion, and Heatran walls you pretty hard. I'd put Hidde Power Fight over it.

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Defense boosting moves are only terrible because they give your opponent free turns to set up, switch to something that smashes face on your other defensive stat, etc. In this case, Acid Armor is actually amazing; Chandelure doesn't have much trouble finding one opponent to set up Calm Minds against, but it's very vulnerable to being killed after it managed to set up (because it's not that fast, nor is it physically bulky). With Acid Armor, your opponent will have a tough time finding two Pokemon who can actually do enough damage to break the Sub and KO the un-subbed, 3/4 health Chandelure (assuming Trick didn't give it a Leftovers). So in this case, Chandelure would LOVE Acid Armor. The point about Heatran is a good one, though; I'd think you could actually drop Flamethrower for HP Fighting; 252/252+ Forretress, for instance, is always OHKO'd by +6 HP Fighting after Stealth Rock, as is Bulky Swords Dance Scizor and Specially Defensive Skarmory.

Swiss Army Ape: supports with SR, scouts with U-turn, poisons a bunch of its counters with Toxic, hits hard with its STABs and possibly breaks stall with Taunt. Tentacruel is about the only thing that can deal with all of its moves that comes to mind, but on a full team of 6MS pokes, you can find plenty of slots for EQ.

This is the Mamo I wish I could run. Sub Mamo is amazing, beating so many counters with a sub up. Add SR for utility and Superpower for more coverage (Rotom-W in particular), and you're golden. I think multi-purposing pokes with wide movepools will be the defining characteristic of this meta: no need to pick a support or offensive Gliscor - have both with SD/Taunt/Ice Fang/EQ/Acrobatics/Toxic!

Pokemon with massive movepools such as Smeargle or Mew are definitely stronger in this tier. Taunt is also very much more useful; as 6 moveslots opens up room for non attacking moves when 4 or 5 moves are enough. It's also much harder to wall a few new pokemon, because they become much more diverse and have much more options. Double Dancing is now much more effective:
Haxorus @ Lum Berry
4 HP / 252 Atk / 252 Spe
Jolly Nature
~Dragon Dance
~Swords Dance
~Outrage
~Dual Chop
~Earthquake
~Aqua Tail
~Superpower

God what a troll this was to face <__> The user kept recycling his Red Card and healing off damage, as well as damaging me, laying hazards and statusing. Whenever I attempted to attack him, I get phazed and take damage from hazards. It didn't last too long cause Deoxys-D isn't as bulky as it seems, but if someone played it just right it would be like a really bulky Prankster Riolu.

Why would you use that Smeargle when there are strictly superior versions of three of the moves (Shift Gear > Agility, Coil > Bulk Up, Quiver Dance > Calm Mind), and none of them are as good as Shell Smash?